Devices helpers

COLD CONTROL IC

29.05.201813.05.2018Devices helpers

In refrigerators with mechanical regulator temperature measured on the evaporator. It happens that the evaporator becomes covered with frost, and the thermostat begins to operate with an error, making failures in work of all lagoapraia. To combat this unwanted phenomenon (including — with the advent of frost) refrigerator has to periodically disable. In some designs there is a semi-automatic defrost mode, which the system is embedded a heating element with the corresponding button.

BATTERIES – ADAPTER

29.05.201813.05.2018Devices helpers

Today, any manufactured device can be supplemented, adapted to the specific household needs of Amateur radio and give the device a seemingly non-core second life.

For example, a widespread audible alarm, the appearance of which is shown in the photo, has excellent opportunities at low cost and small size.

WHY STING “JADWIGA”?

28.05.201813.05.2018Devices helpers

Bee venom — a valuable and irreplaceable raw material for many drugs — get different. For example, when using the device “Jadwiga”. It takes on a special frame-dosborne placed in the hive, annoying the electric impulses that cause bees to defend. Jala frame, winged healer leave on her own, fast crystallizing venom (see “Mo-delist-Konstruktor” No. 12’92 6’99).

ATTITUDE GIVES… KEYCHAIN

27.05.201813.05.2018Devices helpers

The development of purpose, verbal stimulation initiative attitude to improve the health and addictions… assistance in the development of these and other qualities will have the device, protected by patent of Russian Federation № 2109523. The design is presented to the readers.

TWO FLASHES AT ONCE

27.05.201813.05.2018Devices helpers

For portrait and other special types of shots using the flash it is often necessary to illuminate objects from different angles, but Standard… “blitz” the desired effect, alas, does not.

We offer homemade device allows you to turn on sync one camera not one, but two flashes (ФВ1, ФВ2), and this is achieved by operating lighting captured on film objects.

METRONOME-CONDUCTOR

27.05.201813.05.2018Devices helpers

When learning to play a musical instrument to set the tempo often use a mechanical or electronic metronome. Last and I made one of the most popular modern developments. However, during operation it was found that this device is inferior to its mechanical counterpart, with adjustable pendulum, knob, jiggle measured which are perceived as the movement of the baton of the conductor.

WAKE UP ANY

27.05.201813.05.2018Devices helpers

Currently, widespread electronic TRAVEL CLOCK and similar clock with a miniature buzzer as sound source — a reminder about the occurrence of the deadline. However, a small volume of the regular signal, as shown, are often not sufficient in order to Wake up, for example, soundly sleeping man.

SINCE WATERED AUTOMATICALLY

26.05.201813.05.2018Devices helpers

Offer favorite journal I developed a system of automatic watering and spraying plants, well-proven both in the room and in the greenhouse, Conservatory and flower garden. It includes two interrelated processes: “sensor — water” (Fig. 1) and automatic electronic control (Fig. 2). And if the first is easy even going to beginners, the second is better to entrust to those who have sufficient experience and knowledge in the field of electrical and radio engineering.

THE SECOND PROFESSION OF AN ELECTROCARDIOGRAPH

25.05.201813.05.2018Devices helpers

In the process of creating Amateur designs may require tools and equipment that are available it is often difficult. In such cases, comes to the aid of ingenuity, and craftsmen are doing everything they can with their hands. We will talk about how you can make a real recorder-thermoregulator from the old electrocardiograph type ЭК1Т-03M (Fig. 1).

Music game world

25.05.201813.05.2018Devices helpers

Deserved recognition and popularity enjoyed by amateur radio operators is quite simple and reliable circuit includes flip-flop on the two transistors and a pair of thyristors controlled them. It allows you to alternately switch the four incandescent lamps or garlands for the effect of “running lights”.